Income Taxes - Schedule of Temporary Differences That Give Rise to Net Deferred Income Tax Assets (Liabilities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Deferred Income Tax Assets:
Insurance Reserves	$ 76.4	$ 79.3
Unearned Premium Reserves	40.2	44.1
Tax Capitalization of Policy Acquisition Costs	73.3	73.6
Net Operating Loss Carryforward	53.3	100.7
Payroll and Employee Benefit Accruals	38.8	79.9
Other	12.6	10.7
Total Deferred Income Tax Assets	294.6	388.3
Deferred Income Tax Liabilities:
Deferred Policy Acquisition Costs	106.0	104.1
Value of Insurance in Force Acquired	20.2	25.2
Investments	80.0	208.4
Depreciable Assets	26.0	29.3
Goodwill and Licenses	26.8	23.5
Other	3.8	6.3
Total Deferred Income Tax Liabilities	262.8	396.8
Valuation Allowance for State Income Taxes	0	6.6
Net Deferred Income Tax Liabilities	31.8	(15.1)
Federal [Member]
Deferred Income Tax Assets:
Net Operating Loss Carryforward	53.3	94.4
State [Member]
Deferred Income Tax Assets:
Net Operating Loss Carryforward		6.3
Fireside [Member] | State [Member]
Deferred Income Tax Liabilities:
Valuation Allowance for State Income Taxes		6.6
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ (6.6)